Unable to connect to the remote server

Getting this error below every 5 minutes for the past week or more. We ARE using a proxy server but never had this issue before. Any ideas? I even tried adding my proxy server to the Windows server using netsh winhttp set proxy - no luck!

Log Name: Application Source: PDQ Inventory Date: 8/20/2019 3:28:46 PM Event ID: 1128 Task Category: None Level: Warning Keywords: Classic User: N/A Computer:
Description: Unable to connect to the remote server AppDomain : PDQInventoryService.exe CLR Version : 4.0.30319.42000 Current AppDomain : PDQInventoryService.exe Database : C:\ProgramData\Admin Arsenal\PDQ Inventory\Database.db Date : 2019-08-20T19:28:46.6088344Z Entry : C:\Program Files (x86)\Admin Arsenal\PDQ Inventory\PDQInventoryService.exe Error : Unable to connect to the remote server Error Type : System.Net.WebException HResult : 0x80131509 Code:5385 Facility:19 Warning License Mode : Enterprise Mode Manufacturer : VMware, Inc. (VMware Virtual Platform) Memory : 8 GB (4 GB free) PID : 9752 Process : PDQInventoryService Product : PDQ Inventory SentryEnabled : True Service Mode : Server Version : 17.1.0.0 Windows : Microsoft Windows Server 2012 R2 Datacenter (6.3.9600)

Unable to connect to the remote server System.Net.WebException HResult: 0x80131509 Code:5385 Facility:19 Warning ------- INNER EXCEPTIONS ------- A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 104.45.226.98:443 System.Net.Sockets.SocketException NativeErrorCode: 10060 at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress) at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception) ------- OUTER EXCEPTION ------- Unable to connect to the remote server System.Net.WebException HResult: 0x80131509 Code:5385 Facility:19 Warning at System.Net.HttpWebRequest.GetResponse() at AdminArsenal.PDQInventory.Agent.ExternalClientConnection.Submit(IBundledMessage message, WebHeaderCollection headers) at AdminArsenal.PDQInventory.Agent.ExternalClient.Submit(IBundledMessage message) --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at AdminArsenal.PDQInventory.Agent.ExternalClient.Submit(IBundledMessage message) at AdminArsenal.PDQInventory.Agent.ExternalAgentServer.SendAllMessagesForAgent(IAgent agent) at AdminArsenal.PDQInventory.Agent.ExternalAgentServer.ProcessEnqueuedOutboundMessages(IReadOnlyList`1 batch)